diff --git a/package.json b/package.json
index 85658a5..951c25c 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "pretest": "lerna run build --scope='@ffmpeg/*'",
     "test": "server-test test:browser:server http://localhost:3000 test:all",
     "test:all": "npm-run-all test:*:*:*",
-    "test:browser": "mocha-headless-chrome -t 60000 -a allow-file-access-from-files -a enable-features=SharedArrayBuffer",
+    "test:browser": "mocha-headless-chrome -a allow-file-access-from-files -a enable-features=SharedArrayBuffer",
     "test:browser:core:mt": "npm run test:browser -- -f tests/ffmpeg-core-mt.test.html",
     "test:browser:core:st": "npm run test:browser -- -f tests/ffmpeg-core-st.test.html",
     "test:browser:ffmpeg:mt": "npm run test:browser -- -f tests/ffmpeg-mt.test.html",
diff --git a/tests/ffmpeg-core-mt.test.html b/tests/ffmpeg-core-mt.test.html
index 7793122..f8366bb 100644
--- a/tests/ffmpeg-core-mt.test.html
+++ b/tests/ffmpeg-core-mt.test.html
@@ -14,7 +14,10 @@
   <script type="text/javascript">
     window.FFMPEG_TYPE = "mt";
   </script>
-  <script>mocha.setup('bdd');</script>
+  <script>
+    mocha.setup('bdd');
+    mocha.timeout(60000);
+  </script>
   <script src="./ffmpeg-core.test.js"></script>
   <script>
     window.expect = chai.expect;
diff --git a/tests/ffmpeg-core-st.test.html b/tests/ffmpeg-core-st.test.html
index 58bf10f..5ed8ec6 100644
--- a/tests/ffmpeg-core-st.test.html
+++ b/tests/ffmpeg-core-st.test.html
@@ -14,7 +14,10 @@
   <script type="text/javascript">
     window.FFMPEG_TYPE = "st";
   </script>
-  <script>mocha.setup('bdd');</script>
+  <script>
+    mocha.setup('bdd');
+    mocha.timeout(60000);
+  </script>
   <script src="./ffmpeg-core.test.js"></script>
   <script>
     window.expect = chai.expect;
diff --git a/tests/ffmpeg-mt.test.html b/tests/ffmpeg-mt.test.html
index 0d9c473..59ee0a5 100644
--- a/tests/ffmpeg-mt.test.html
+++ b/tests/ffmpeg-mt.test.html
@@ -15,7 +15,10 @@
     window.FFMPEG_TYPE = "mt";
     window.CORE_URL = "http://localhost:3000/packages/core-mt/dist/umd/ffmpeg-core.js";
   </script>
-  <script>mocha.setup('bdd');</script>
+  <script>
+    mocha.setup('bdd');
+    mocha.timeout(60000);
+  </script>
   <script src="./ffmpeg.test.js"></script>
   <script>
     window.expect = chai.expect;
diff --git a/tests/ffmpeg-st.test.html b/tests/ffmpeg-st.test.html
index bddf59c..7df3b66 100644
--- a/tests/ffmpeg-st.test.html
+++ b/tests/ffmpeg-st.test.html
@@ -15,7 +15,10 @@
     window.FFMPEG_TYPE = "st";
     window.CORE_URL = "http://localhost:3000/packages/core/dist/umd/ffmpeg-core.js";
   </script>
-  <script>mocha.setup('bdd');</script>
+  <script>
+    mocha.setup('bdd');
+    mocha.timeout(60000);
+  </script>
   <script src="./ffmpeg.test.js"></script>
   <script>
     window.expect = chai.expect;